Are all the ingredients in Lorazepam manufactured 8/11/10 same as now?

My prescription of that date lowers my blood pressure, gives me a happy, non-concerned attitude - does the trick. Lorazepam from other manufacturers can make me tense and can drive up my blood pressure - (can't take regular blood pressure meds eiher, of any kind). I have to renew my prescription for Lorazepam and I need to be reassured that your current Lorazepam formula is the same formula as Aug 2010, including fillers?